945 is the lowest common denominator. 3 is the greatest common factor.
The common denominator of any two or more whole numbers will always be 1.
least common denominator for 15 and 10 is 30, so 9/15 = 18/30 and 7/10 = 21/30
Find a common denominator. 21 is common. Multiply the fractions to achieve a common denominator of 21. 3/7 + 2/3 = 9/21 + 14/21 = 23/21
42
945 is the lowest common denominator. 3 is the greatest common factor.
The common denominator of any two or more whole numbers will always be 1.
420
least common denominator for 15 and 10 is 30, so 9/15 = 18/30 and 7/10 = 21/30
A common denominator, though not the least one, is 24*21 = 504.
15 over 21 simplifies to 5 over 7. To simplify, both the numerator (15) and denominator (21) can be divided by their greatest common factor, which is 3.
I'd say "8". All others have the common denominator "3" in common.
Find a common denominator. 21 is common. Multiply the fractions to achieve a common denominator of 21. 3/7 + 2/3 = 9/21 + 14/21 = 23/21
168
42
The lowest common denominator of any two or more whole numbers, such as 15 and 21, will always be one (1) because common denominators refers to the denominators of two or more fractions or mixed numbers, not whole numbers. So, a set of whole numbers (x,x) would have to be converted to their fraction equivalents, i.e., x/1, which will always yield a denominator of 1.
So with 3 fractions with denominators of 28 21 and 15: 28 = 7 x 4, 21 = 7 x 3, and 15 = 5 x 3. 28 and 21 have 7 in common; 21 and 15 have 3 in common, so those factors are used once: 7 x 4 x 3 x 5 = 420